Monday, 9 September 2013

JAVA: Hypnosis Animation

Hypnosis animation
Hypnosis animation

package jay;

/**
 *
 * @author jay.thakkar
 */
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.GeneralPath;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class Hypnosis1 extends JComponent implements Runnable {

    private int[] coordinates;
    private int[] deltas;
    private Paint paint;

    public Hypnosis1(int numberOfSegments) {
        int numberOfCoordinates = numberOfSegments * 4 + 2;
        coordinates = new int[numberOfCoordinates];
        deltas = new int[numberOfCoordinates];
        for (int i = 0; i < numberOfCoordinates; i++) {
            coordinates[i] = (int) (Math.random() * 300);
            deltas[i] = (int) (Math.random() * 4 + 3);
            if (deltas[i] > 4) {
                deltas[i] = -(deltas[i] - 3);
            }
        }
        paint = new GradientPaint(0, 0, Color.blue, 20, 10, Color.red, true);

        Thread t = new Thread(this);
        t.start();
    }

    public void run() {
        try {
            while (true) {
                timeStep();
                repaint();
                Thread.sleep(1000 / 24);
            }
        } catch (InterruptedException ie) {
        }
    }

    public void paint(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        Shape s = createShape();
        g2.setPaint(paint);
        g2.fill(s);
        g2.setPaint(Color.white);
        g2.draw(s);
    }

    private void timeStep() {
        Dimension d = getSize();
        if (d.width == 0 || d.height == 0) {
            return;
        }
        for (int i = 0; i < coordinates.length; i++) {
            coordinates[i] += deltas[i];
            int limit = (i % 2 == 0) ? d.width : d.height;
            if (coordinates[i] < 0) {
                coordinates[i] = 0;
                deltas[i] = -deltas[i];
            } else if (coordinates[i] > limit) {
                coordinates[i] = limit - 1;
                deltas[i] = -deltas[i];
            }
        }
    }

    private Shape createShape() {
        GeneralPath path = new GeneralPath();
        path.moveTo(coordinates[0], coordinates[1]);
        for (int i = 2; i < coordinates.length; i += 4) {
            path.quadTo(coordinates[i], coordinates[i + 1], coordinates[i + 2], coordinates[i + 3]);
        }
        path.closePath();
        return path;
    }

    public static void main(String[] args) {
        JFrame f = new JFrame("Hypnosis");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new Hypnosis1(4));
        f.setSize(300, 300);
        f.setVisible(true);
    }
}
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